avoid empty boolean value

Signed-off-by: Maxence Lange <maxence@artificial-owl.com>

lib/Migration/Version0002Date20190506000001.php

@@ -1161,6 +1161,8 @@ class Version0002Date20190506000001 extends SimpleMigrationStep {
 	 * @param string $source
 	 * @param string $dest
 	 * @param array $fields
+	 *
+	 * @throws Exception
 	 */
 	private function duplicateTable(
 		ISchemaWrapper $schema, string $source, string $dest, array $fields
@@ -1200,6 +1202,13 @@ class Version0002Date20190506000001 extends SimpleMigrationStep {
 			'published_time'
 		];
 
+		$booleanFields = [
+			'local',
+			'public',
+			'accepted',
+			'hidden_on_timeline'
+		];
+
 		foreach ($fields as $field) {
 			$value = $this->get($field, $data, '');
 			if ($field === 'id_prim'
@@ -1207,19 +1216,23 @@ class Version0002Date20190506000001 extends SimpleMigrationStep {
 				&& $this->get('id', $data, '') !== '') {
 				$value = hash('sha512', $this->get('id', $data, ''));
 			}
-			
+
 			if (in_array($field, $datetimeFields) && $value === '') {
 				$insert->setValue(
 					$field,
 					$insert->createNamedParameter(new DateTime('now'), IQueryBuilder::PARAM_DATE)
 				);
+			} else if (in_array($field, $booleanFields) && $value === '') {
+				$insert->setValue(
+					$field, $insert->createNamedParameter('0')
+				);
 			} else {
 				$insert->setValue(
 					$field, $insert->createNamedParameter($value)
 				);
 			}
 		}
-		
+
 		try {
 			$insert->execute();
 		} catch (UniqueConstraintViolationException $e) {